IRIS S550 Applications Manual Download Page 13

673 - 637
573 - 537
473 - 437
373 - 337
273 - 237
173 - 137
073 - 000

This approach makes a wide range available for
gain multi plier changes using the two least
significant digits. For example, over a range of
137 to 199 the gain is changed by a ratio of 99/37.
It is advan ta geous for moderate changes in gain to
change only the gain multi plier digits because the
response to these changes is very linear.  When
changes are made in the most significant gain
digit, the gain change is not always exactly an
ideal 2:1 step change.

MAN UAL SETUP OF THE S550

The steps below for manual setup should result in
the P520 or P522 displaying a reading close to
1200 with flame on. This pro ce dure should pro -
vide similar gain settings for each selected sensor
as in the 

CALIBRATION 

pro ce dure described

earlier.

1) Bring the firing rate of the burner to a low fire

condition.

2) Be sure that the external input for CHAN SEL

is properly set for the channel calibration (A or 
B) that is currently being set and the channel
LED is ON continu ously.

3) Decide whether to setup the S550 using the

UV or IR sensor bef ore aiming the viewing
head. In some flames the best UV reading of
the flame envelope may be found at a different 
location from the best IR reading. See earlier
sections 

IR DETECTOR

 and 

UV DETECTOR

.

Use the Adjust Mode (“AdJ?”) pro ce dure for
the S550 described above and set the gain for
the sensor not being used to zero.

4) If the IR sensor is being used, bef ore final

aiming but with a typical reading on the
display, verify that the S550 is not saturated by 
reducing the IR gain by 100. The displayed
reading should be reduced by roughly 1/2. If it

stays the same or actually increases, the S550
is saturated. Continue reducing the gain in
steps of 100 until the displayed reading is
reduced. Then set the gain so the reading is in
the 1000 to 1400 range. If the IR sensor was
not saturated one can skip para graph 5) below.

5) If the S550 was saturating  one should check

the aiming of  the S550 again using the LED
on the back of the housing to adjust the
viewing angle of the head for a maximum
pulse rate. If the LED pulse rate is then too
high (the LED is ON almost continu ously)
change the gain once more by using the Adjust 
Mode pro ce dure to get a reading in the 1000 to 
1400 range. Then maximize the pulse rate by
re-aiming the S550 viewing head. This pro ce 

-

dure of optimizing the sighting and adjusting
the gain may have to be done more than one
time to be assured that the S550 is properly
setup. 

6) If the UV sensor has been chosen adjust the

gain (00-99) using the Adjust Mode so the
displayed reading is close to 1200. The UV
sensor is not likely to saturate but if the flame
signal readings are very high on low gain
settings then one should orifice the sighting.
See section 

ORIFICING.

7) Set or at least check the Flame ON and Flame

OFF set points. If they are still at the factory
default values (Flame ON at 800 and Flame
OFF at 600) they may be satis factory as they
are. If the Flame ON reading is less than 1200
the Flame OFF setting should be propor tion 

-

ately less.

8) Review the settings for F.F.R.T. and TIME

DELAY ON and adjust if necessary.

RE TURN TO DE FAULT SET TINGS

There are three major branches on the decision
tree after one gets into the S550 setup by pressing
the A and B push buttons. Ref er to Fig. 3 at the
end of this manual. That is, if one says NO to
“CAL?”, one is asked if one wishes to do adjust. If 
one says NO to “AdJ?”, one is asked if one wishes
to go back to the default settings. If one says NO
to “dEF?”, then the P520/P522 and S550 continue

PAGE 13

IRIS MODEL S550 APPLICATION MANUAL

Summary of Contents for S550

Page 1: ...PAGE 1 IRIS MODEL S550 APPLICATION MANUAL FLAME MONITORING SYSTEM MODEL S550 S552 S556 VIEWING HEAD APPLICATION MANUAL ...

Page 2: ... ARE STORED 8 ASSIGNING DIFF S550 SETTINGS TO A B 9 USING TWO VIEWING HEADS PER AMPLIFIER 9 BEFORE MAKING ADJUSTMENTS 10 NEW P520 P522 FRONT PANEL 10 CALIBRATING THE S550 10 EXAMINING RESULTS GAIN SETTINGS CALIB 10 CHECKING OR CHANGING UV GAIN 11 CHECKING OR CHANGING IR FILTER 11 CHECKING OR CHANGING IR GAIN 11 MANUAL SETUP OF THE S550 12 RETURN TO DEFAULT SETTINGS 12 ANGLE OF VIEW 13 GENERAL COMM...

Page 3: ...Filter Selection 1 8 b IR gain 0 699 When it comes to features like CAL which will be described later the operator is only given those choices which are appropriate For example he does not have to choose between calibrating with the UV sensor or the IR sensor in CAL he is only offered the choice of calibrating with the IR sensor or not This is shown in the FLOWCHART OF S552 PROGRAMMING Figure 4 on...

Page 4: ...processors Also the earlier IR sensitive family members had only 4 high pass filters to choose from the S550 has 8 S511 S512 S550 LL 36 Hz 1 16 Hz L 71 Hz 2 24 Hz M 105 Hz 3 33 Hz H 186 Hz 4 52 Hz 5 75 Hz 6 100 Hz 7 155 Hz 8 215 Hz TECHNOLOGY USED IN THE S550 The UV and IR sensors in the S550 share a common optical axis efficiently by using a unique dichroic beamsplitting mirror Over 80 of the ult...

Page 5: ...PAGE 5 IRIS MODEL S550 APPLICATION MANUAL ...

Page 6: ...e done as follows Remove the plug from its packaging and layout the components 1 Strip 2 inches of the cable outer cover from the cable removing any cellophane wrap or filler material and strip the insulation from the shielded wire if insulated over shield a full 2 inches to expose shield 2 Slide the shield back until a bulge develops close to where the wire exits the cable outer covering 3 Carefu...

Page 7: ... entirely The reason for this is that there is a complete change in the flicker content for the existing viewing head sighting If this is the case then one should try and optimize the flame signal for the sour gas by zeroing in on this flame not the warm up burner After optimizing the sighting for the sour gas one may find that the signal level is too low on the natural gas One should then try the...

Page 8: ...ition the zone of higher UV intensity does not overlap the same zones of adjacent or opposing burners so that with proper sighting discrimination is predictable As a general rule the sighting of the S550 when using the UV detector will be more likely a line of sight than the IR flicker detector which will read flame signals bouncing off the side of the sight pipe and other reflectors Sometimes the...

Page 9: ...n the signal level so if the associated S550 and signal processor has been previously calibrated it will be necessary to calibrate the processor again so that the gain settings will be correct If the discrimi nation is still not satisfactory then try an orificing disc with a smaller diameter hole Generally speaking orificing should always be considered when the burner s are large 50K lbs of steam ...

Page 10: ...manually changing S550 settings when the desired channel is not selected press the push button for the desired channel and then proceed During the process of examining or changing the S550 settings with the Channel A and B NO and YES push buttons the red LED for the channel which the changes apply will be blinking One should visually check which channel push button is lighted when the S550 setting...

Page 11: ...ture one does not have the option of working with the channel that is not selected by the external input 3 Bring the firing rate of the burner to a low fire condition 4 If the flame relay has not pulled in adjust the flame on off set points so it does pull in 5 Decide whether to calibrate using the UV or IR sensor See earlier sections on I R DETECTOR and UV DETECTOR At the front panel of the P520 ...

Page 12: ...r all of the initial setup proce dures described in this manual Further infor mation on how these filters can affect the discrimi nation ratio is found in the P520 APPLICATION MANUAL and in the P522 APPLICATION MANUAL in the section MULTIBURNER REQUIREMENTS For further information please call the factory or contact IRIS Systems Inc See page 13 for contact information CHECKING OR CHANGING IR GAIN Y...

Page 13: ...tinue reducing the gain in steps of 100 until the displayed reading is reduced Then set the gain so the reading is in the 1000 to 1400 range If the IR sensor was not saturated one can skip paragraph 5 below 5 If the S550 was saturating one should check the aiming of the S550 again using the LED on the back of the housing to adjust the viewing angle of the head for a maximum pulse rate If the LED p...

Page 14: ...vative product that this is the ultimate state of the art flame monitor The way it works has been described only in a general sense and obviously the algorithms implemented by the embedded controller software are proprietary and will not be made public Any existing P520 or P522 signal processor can be upgraded to an S550 compatible processor by changing the controller chip and the front panel TECH...

Page 15: ...PAGE 15 IRIS MODEL S550 APPLICATION MANUAL Figure 1 Figure 2 ...

Page 16: ...IRIS MODEL S550 APPLICATION MANUAL PAGE 16 Figure 3 ...

Page 17: ...PAGE 17 IRIS MODEL S550 APPLICATION MANUAL Figure 4 ...

Page 18: ...PAGE 18 IRIS MODEL S550 APPLICATION MANUAL Figure 5 ...

Page 19: ...PAGE 19 IRIS MODEL S550 APPLICATION MANUAL 5 June 1997 ...

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